Slag-granulating apparatus.



PATENTED JUNE 26, 1906.

E. B CLARK. SLA-G GRANULATING APPARATUS.

APPLICATION FILED sEPT.5, 1905.

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E. B. CLARK. SLAG GRANULATING APPARATUS.

APPLICATION FILED SEPT. 5. 1905.

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PATENTED JUNE 26, 1906.

E. B. CLARK. SLAG GRANULATING APPARATUS.

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APPLICATION FILED SEPT. 5,`19os.

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No. 824,340. PATENTED JUNE 26, 1906.

E. B. CLARK. SLAG GRANULATING APPARATUS.

APPLICATION FILED SEPT. 5. 1905.

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UNITED sTATEs 4'PATENT oEEroE. I

EUGENE B. CLARK, oF cnicAGo. iLLiNois.

sLAGGRANugATlNG APPARATUS',

Specication of I Ietters Patent.

ratentetf June 26, 1906.

Application filed September 5. 1905. Serial No. 277,059.

To a/ZZ whom; it may concern.'

' Be it known that I, EUGENE B. CLARK, al citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful. Improvements in Slagfrranulating Apparatus,

of which the following is a full and complete from blast-furnaces and other 'sources it is essential that the stream of Water and cinders should drop into a tank containing water.

If the tank does not 'contain Water in 'sufficient quantity, the cinder will be ulfy and porous, which makes it unavailable for most of the purposes for which it is used. Now if this cinder is excavated from a tankcontaining water after it has been granulated and without `the Water having been drawn off from the tank the large amount of water Which-is necessarily taken out with the cinder and loaded into the car becomes objectionable because it allows too much granulated cinde'r` to escape from the car around u on the tracks. In the winter it is especially o jectionable for another reason, because the car-load of 'wet cinder is apt to freeze solid, making it exceedingly difficult to unload. Icicles form from the bottom of\the car to the ground, which freezethe running-gear ofthe car solid with ice and even freeze the car solid to the ground. Besides, after the removal of thev cinder in such ap aratus. a considerable portion remains in t e water remaining in the tank, and if thewater vis then drawn out more or less cinder will flow out with it into the sewers. On the other hand, when it is attem ted to draw the water 0H from the tank before the granulated lcinder is remved devices which have been used to prevent the running on of the granulated cinder` With the Water would prevent the running off For instance, screens have been used, but they have been unsuccessful. As the specific gravity of granulated cinder varies with the character ofthe slag, some being lighter than water and vsome heavier and some of about the same specific gravity, the openings of -the screen clog with the cinder and prevent the outflow of the water. The principal object of my invention is to provide an apparatus which Will overcome these diiiiculties. Another object of my invention is to construct a slag-granulating apparatus which maybe rapidl and economically used, one portion thereo being emptied While the other is being filled.

Other objects of my .invention are to improve slag-granulating apparatus in sundry details hereinafter pointed out.

' I accomplish these objects by means of the apparatus hereinafter described.

` What I claim as new will be pointed out in'l In the drawings, Figure 1 is a to view. Fig. 2 is avertical section on line 2 2 of Fig. 1. Fig. 3 is ahorizontal section on line3 3 of Fig. 2. Fig..4 is avvertical cross-section on line 4 4 of Fig. 1. Fig.- 5 is an enlarged d etail, bein a partial vertical section showing the filtered and water-channels at one side of the bed". Fig. 6 is an enlarged detail, be-

ing a view of one of the gates by which the troughs for conveying the sla are opened and closed. Fig. 7 is an enlarge detail, being a section online 7 7 of Fig. 6.

Referring to vthe drawings, 8 indicates a tank which is generally rectangular in shape, the Walls of which are built, preferably, of cement or concrete or some similar material and which is divided by partition 9 into' two compartments 10 and 11.

12.13 indicate chutes or troughs which lead from a blast-furnace `(not shown) to the com` partments. 10 and 11, respectively, and down which the molten slag passes from the furnace to the tank.

14' 1'5 indicate suitable source of water-supply (not shown) and open into the troughs or c utes 12 13.

16 17 indicate chambers of the same height as the compartments 10 and 11, which are located at the forward end ofthe tank.

18 indicates a passage or channel formed at the bottom of the side Walls of the tank 8 and at ythebottcm of the partition 9, which surrounds the compartment 10 u on three sides and opens at one end into 4t e charnber 16.

19 indicates passagesat the bottom of the pipes -which lead to any or plan IOO compartment 10, opening therefrom into the passage 18.v

2O indicates a passage or channel formed IIO bottom thereof, which surrounds the chamber 11 upon three sides and opens at its fory ward end into the passage 17.

21 indicates passages which open from the bottom of the compartment 11 into the passage 20.

22 indicates a chamber located in front of the tank 8, and 23 indicates a dischargepipe by means of which the chamber 22 is discharged. A l

24 indicates pipes opening at various heights above the bottom into the chambers 16 and 17 'and controlled A'by valves 25. The lower row of the pipes 24 open into the chamber 16 at a height somewhat above the top of the passages 18 and 20 and above the top of the filter-bed, hereinafter described.

26 indicates gates which are adapted to open or close-the chutes or troughs12 and 13, so that either one may be opened for the flow of molten slag from a blast-furnace or other source to the tank 8. Any well-known and approved form of gate or stoppage device may be used.

27 indicates a filter-bed which is referably formed of broken stone with the largest stones at the bottom, the stones decreasing in size toward the top, where the stones of the smallest size are placed.

28 indicates cross-bars which are supported upon beams 29, which run longitudinally of the tank and which support sections of railroad-rails 30 upon them above the lter-bed 27. The filter-bed and rails are of such height that the top oi" lthe'rails 30 is a short distance below the opening of the lowest row of-pipes 24 into the chamber 16, whereby a minimum height of water a short distance above the top of the filter-bed and rails will be constantly maintained in the chambers 10 and11 of the tank 8.

31 indicates a traveling crane provided with a grab-bucket 32 of any ap roved form 'or description by means of whic the granulated cinder may be removed Jfrom the tank and which being of any well-known form or description and forming no part of my present invention is indicated only diagrammatically in the drawings and needs, I believe, no further description.

The operation of the above-described devices is as follows: Une or both of the chambers 10 11 is partly lled with water to such height as may be desired, determined v,by opening one or the other of the rows of pipes 24 above the lowest row..l It will be obvious that the' water by means of the passages 18 19 20 21 will be maintained in the chambers 16 17 at the same height as in the compartments 10 11. The molten slag is thereupon allowedto flow down one of the chutessay chute 12-where it meets with a streamA of water ilowing into it from the pipe 14, which artiallyl granulates the slag. The mingle Vwater and slag fall together into the water in the compartment 10, where the granulation is completed. As the slag continues to iow the granulated slag will settle in the compartment and form a bed above the filter-bed and above-the rails 30. @wing to the position of the lowest row of pipes 24 being above the tops of the rails 30 this will cause a constant bed of moist granulated slag to be formed abovethe stone filter-bed.' The water in the chamber 10 will be kept at a constant level as it filters down through the vlayer of slag and through the filter-bed 27 and passing -out through -the passage 1.8 into the chamber 16 is discharged through the pipes 24 into the chamber 22, and thence .out through the discharge-pipe 23. The chamber 22 is open at the top and of such size 'that the water passing into it may be examined to see that no granulated slag` is passing oil with the water. When the compartment l0 is sufficiently lled with the granulated slag, the lowest row of pipes 24 is opened and the Water ltering through the constantly-preserved bed of moist granulated slag above the rails and through'the ilter-bed, so that vit carries no granulated slag with it, is loweredto the level ofthe lowest row of pipes. Thereupon the gate 26, controlling the chute 12, is closed, the gate controlling chute 13 is opened, and the proc- .ess is repeated in the compartment 11. While the .granulating is taking place in the compartment 11, the granulated slagin'comartment 10' is removed by means of grabucket 32,A the rails 30 preventing the grabbucket from disturbing the filter-bed 27. While compartment 10 is bein emptied, compartment 11 is being filled. lvhen compartment 11 islled with granulated slag, the chute leading into it is closed and the operation oi granulating repeated in compartment 1o.V

Instead of illing one of the compartments with water to a level which will be sucientv for the entire granulating operation it is obvious that one of the lower rows of dischar epipes may be opened and water lled into t e compartment up to that level and that as the granulation continues that row may be closed and the next one above it o ened, and so on till the compartment is lle I have shown my apparatus in the drawings as divided transversely by a partition separating it into two compartments.

arranged without departing from the spirit of ^my invention in this respect, and I therefore do not limit m self to a partition so located. l By means o this apparatus and operation I am enabledto prevent the granulated sla from flowing 0H with the water discharge from the compartments,l which not onl causes a loss of the granulated slag,but which is objectionable, as allowing slag to flow into the sewers with the discharged water. I also It will be obvious', however, that the partition might be otherwise IOO by arranging the lower row of discharge-pipes 24 above the tops of the rails 30, as has been said, provide that the water can never be drawn off to a point where the rails will not be Submer ed. This materially assists in the proper tration of the water through the granulated slag, which, as has been said, forms the top ayer of the lter-bed, for if the granulated slag is allowed to become alternately dry and wet, as would be the case if the water were allowed to run entirely away, it has been found that the ranulated slag has a tendency to form a soli mass throu h which the water will not filter, whereas t e likelihood of this condition occurring is reatly lessened or entirely done away with A1f the granulated-slag layer at the bottom is kept constantly wet by being constantly submerged. I

Vlhat I claim as new, and desire to secure by Letters Patentis- 1. In a slag-granulating apparatus, the combination with a tank, and means for feeding mixed slag and water thereto, of means for regulating the height of water in said tank durin the granulating operation, a filter-bed in sai tank, means for preventing the water in said tank from fallin below a minimum fixed level above said ter-bed, and means for dischar ing the water in said tank down to said leve through said filter-bed, substantially as described.

2. In a slagranulating apparatus, thev combination wit a tank and means for feeding mixed slag and water thereto, of a chamber adjacent to said tank, a filter-bed in the bottomv of said tank, passages connecting the lower part of said tank with the lower part of said chamber, and discharge-pipes opening out of said chamber at different heights, the lowest of said dischar e-pipes being above the top of said filter-be v 3. In a slagranulating apparatus, the combination wit atank, and means for feeding mixed slag and water thereto, of a chamber adjacent to said tank and of substantially the same height therewith, connections between said tank and said chamber, a filterbed in the bottom of said tank, and dischargepipes from said chamber at dierent heights, the lowest of such discharge-pipes being located a short distance above the top of the filter-bed, substantially as described.

4. In a slag -granulating apparatus, the combination with a tank, and means for feeding mixedslag and water thereto, of a chamber adjacent to said tank and of substantially the same height therewith, connections between said tank and said chamber, a filterbed in the bottom of said tank, dischargepipes from said chamber at different heights the lowest of such discharge-pipes being located a short distance above the top of the filter-bed, and an external chamber into which said pipes discharge, substantially as described.

EUGENE B. CLARK. Witnesses:

JOHN R. EMERSON, PETER GORMAN. 

